Telephony.



PATENTED JULY 12, 1904.

I. KITSEB. TELEPHONY.

Arrmoulon FILED AUG. 27. 1903.

N0 MODEL.

Gnomi e1 i wir" ze.:

UNITED STATES Patented July 12, 1904.

PATENT 'OFFICE TELEPHONY.

SPECIFICATION forming part of Letters Patent No. 765,142, dated July 12,1904.

Original application iiled March 7, 1901, Serial No. 50,232.

To @ZZ wh/mn it many concern:

Be it known that I, IsIDoR Krrsnn, a citizen of the United States, and aresident of the city and county of Philadelphia, State of Pennsylvania,have invented certain new and useful Improvements in Telephony, of whichthe following is a full, clear, and complete disclosure.

My invention relates to improvements in telephony, and involvesparticularly those parts of telephone systems located at the centralexchanges, especially switchboards and theiraccessories for makingconnections between different subscribers stations.

The object of my invention is to facilitate the connecting of twosubscribers circuits, doing away with the inconvenient and cumbersomecord-circuits or cord connections, thereby reducing Ithe number ofoperations necessary in making' connections and at the same time makingmany of said operations automatic in their action.

The subject-matter of the present application involves certain featuresof the systems above referred to which have been particularly describedand claimed in my prior application, Serial No. 50,232, filed March 7,1901, of which this application is a division. The features of myinvention covered in this application involve certain details ofconstruction, particularly those of the switchboards, plugs, andconnections therefor.

For a full, clear, and exact description of these features of myinvention reference may be had to the following specification and to theaccompanyingdrawings, forminga part thereof, in which- Figure lrepresents an elevation of a switchboard; Fig. 2, a view of one of theconnecting-plates and its operating-magnet; and Fig. 3, a view showingthe connections for two plugs in the call and distributing switchboards,respectively, together with details of the plugs and their sockets.

l represents what I term a call-boardthat is, a board to which the callsare primarily sent and in the leads to which from Aeach station a dropor other annunciator may be inserted to call the attention of theoperator. The distributing-board-that is, the

Divided and this application filed August 27, A1903. Serial (No model.)

board from which the call is sent to the station desired to be connectedto a station which has called up through the call-board-is similar tothe call-hoard, but preferably contains a greater number of plugs. It isobvious that each outlying station must have a plug-switch in both acall-board and a distrilniting-board in order to allow of any stationbeing connected with any other.

Since one operator cannot attend to all the plugs or lines in oneswitchboard, the callboards are divided into sections, each consistingof a suitable number of plugs to be easily taken care of by oneoperator. Several of these sections of the call-board may be placedopposite one distributing-board, and the latter may be duplicated untilthere is room for all the sections of the call-board. This arrangementdoes not differ from those in the well-known central-station practice ofthe present day. The call and distributing boardsmay be placed in thesame vertical frame; but this is not essential, as they may be placedaccording to choice and convenience.

My improved connecting or switch boards are especially applicable to beused with the so-called centralenergy telephone systems or those where aclosed circuit is maintained to each telephone-station when the same isnot in use, although they may be adapted to be used with other systems.

2 and 3 are contact-plates which are located at the limit of the outwardmovement of the plug 4 and are connected, respectively, with the polesof a common main battery 44. The plugs and terminals are arranged on theboards in regular polygonal figures and preferably in vertical andhorizontal lines, forming squares, as in switchboards now in use, therealso being' but a single terminal for each line in a one panel or board.

The plugtis preferably of non-conducting material and is surrounded bythe semicylindrical. halves of the plug-socket 5 and 6, to each of whichis connected one of the leads from a telephone-station. The plugll hasan extension 7, which passes through an opening in the fixed plate 8 andis adapted, in connection with the parts and (i ot the plug-socket, toform a guide tor the plug 4. i'. spring Si, interposed between the plate8 and the bottom ot' the plug 4, acts to return the plug to its normalor inoiiei'ative position.

1'0 is a loi'igitiulinal contact carried by the plug 4, which is adaptedto form an electrical connection between the parts 2% and ('3 when theplug is in its normal or inoperative position.

11 is a lixed plate o'lI coi'iductive material and is located adjacentthe ends ot the plugsoclets, so that when the plug is depressed thecontact 1() will make electrical coniiection between the same and thepart (5, as shown in Fig. 3.

12 is a contact carried by the pl ug 4, which is always in contact withthe part 5 ol the plug-socket and connects said part with the part 2when the plug is in its normal position.

13 13, &c., are conductive plates or trames, so connected as to beoperative in pairs, one plate ot' each pair being located in the calland distributing boards, respectively, and have slots 14 formed thereinthrough which the plugs 4 are adapted to pass. These plates areinsulated from each other and are carried by rollers 15 or othersuitable antit'rictioii devices. r1`hey ai'e held in their normal orinoperativepositionsbysuitable springs 1o. 'lihe plates 13 correspond tothe cord connectors in the cord-circuit systems and are o t a similarnum ber-*to wit, about ten per cent. ot' the number of stationsconnected to'any one panel ot' a switchboard. ',lhe slots in the plates18 are ot' sutiicient length to allow either one ot the pawls 18 or 17to pass therethrough in either direction, .according to whether a plateis in its operative or inoi'ierative position. rl`he pawls 18 and 17have insulating-strips 2O and 19 upon one side thereol, respectively, sothat in passing' the plates 123 in one direction no electrical contactsare made therewith. The pawl 17 is held in its normal raised position bythe spring-arm 21, and the pawl 18 is adapted to rest upon thespring-arm 2Q by gravity when in its lower or inoi'ierative position. 23isa pin or projection carried by the pawl 18 and is adapted to contactwith the upper edge oi.: the pawl 17, so that when the pawl 17 is raised18 will be depressed and when 18`is raised 17 will be depressed. rlhesepawls 18 and 17 are pivoted upon a pin 24, which has electricalconnection with the contact 12 by means o1" the wire then the plug -1-is depressed, the pawl 18 will engage the lirst plate which isnotalreadv in use to make a connection. Thisis due to the tact that theslots 14 are so located that when the plates 1?) are moved by theirmagnets one end o'l the slot will come inio alinement with the end oli'the pawl 18 and allow the same to pass without iiiterruption, rl`he pawl18 will therefore engage the lirst plate which is not in use, and as theinward movement ot the plug 4 is continued the pawl 18 will be raised,thereby depressing and extending the pawl 17. At the same time the loweruninsulated side ot' the pawl 18 will contact with the plate and malte aconnection to energize a magnet 26 to draw the plate into its operativeposition. As the plate 18 is drawn over the plat'e at the opposite endof the slot passes over the end et' the pawl 17, which has beendepressed, therebyT making a contact with the uninsulated part ot'thesame, which maintains the action ol" the magnet 26 iirst energized,while at the same time the pawl 18 is allowed to drop into its originalposition. as illustrated in the upper part of Fig. 8. The magnet 26 isenergized by the battery 27, the current passing' through the armature28, hereinafter to be more particularly described, contact 2 9-, magnet26, plate 13, pawl 17, wire Q5, contact 12', and contact 5 to battery27.

28 is an armature which is normally in contact with the point 29 and isretained in that position by the arm 30, which in the plates of thecall-board is insulated, but in the distribating-board is electricallyconnected with the plate 1B. A .clearing-out magnet 31 acts upon thearmature 28 to withdraw it from the point 29 when the arm 30 allows itto do so by. reason et' the movement ot' the plate 13. The magnets 31are electrically connected in pairs corresponding to the pairs ot'plates in the call and distributing boards and not energized until bothreceivers are oti their hooks at the calling' and the calledtelepl'iones. This is made possible Ytroni the fact that the leads 33and 4G are connected to the parts 5 and in each board, respectively,which will allow the current to passthrough the contacts 1Q, wires Q5,pawls 17, plates 13, magnets 26, and magnets 81. In thedistributing-switchboards the arms 30 contact with points 35 when theplates are attracted by the magnets. These points 85 are connectedtoground 36 through the batteries 87. 38 is a battery, cach pole o1which is connected with the plates 11 in the call and distributingboards, respectively.

iCach telephone-station is provided with the usual contacts consistingot' thepoints 39 and 4l), which are adapted to be engaged by thereceiver-hook lever 41, the point4O being connected to ground 42 throughthe vibrating call-hell 48.

Operation: Supposing a call has been made Vfrom the station A, the plug'4 in the callboard is then depressed, thereby putting the pawl 17 incontact with the plate 13, which is attracted by the magnet 26, as abovedescribed. The operator at the call-board then ascertains Yfrom thesubscriber at station A what other station he wishes to converse withand thereupon depresses the plug corresponding to that station in thedistributingboard. then the plug 4 in the distributingboard isdepressed, the disengaged plate 13, corresponding to the plate 13 justoperated in the call-board, is connected with the plug and itscorresponding magnet 26 energized. The arm 30 then contacts With thepoint 35, thereby closing a circuit from battery 37 through ground 36,ground 42, bell 43, contact 40, lever 41, lead 46, part 5, contact 12,Wire 25, pawl 17, plate 13 to arm 30, and contact 35. The bell atstation B is therefore kept ringing until the call is answered and thereceiver is lifted from its hook-lever 41. When this is done, bothmagnets 31 are energized and the armatures 28 withdrawn from the points29. Both telephone instruments are then connected together through thebattery 38 by a circuit passing through the plate 11 of thedistributing-board, contact 10, part 6, lead 45, lead 46, part 5,contact 12, Wire 25, pavvl17, plate 13, magnet 26, magnet 31, magnet 31of the callboard, magnet 26plate 13, paWl 17, Wire 25, contact 12, part5, leads 33 and 32, part 6, contact 10, plate 11 to battery 38. Bothstations are therefore connected for talking and remain in thatcondition until one of the receivers is replaced on its hook, therebybreaking the circuit through both pairs otl magnets 26 and 31, Whichreturns the plates 13 and plugs 4 to their normal positions. Then intheir normal positions the plugs 4 connect the battery 44 with the leadsJfrom the stations through the parts 2, 12, 5,- and 3, 10 and 6, therebykeeping the subscribers lines 33 and 46 constantly energized when saidlines are not in use. The stations, annuciators or calls, and theoperators telephones may be connected with the line-terminals in anyWell-known Way Which Will be self-suggestive to one skilled in the art,and I have not shown the same, as they form no part of my invention, andtheir omission simplilies the description.

Changes may be made in the form and arrangement of parts Withoutdeparting from the spirit and scope of my invention; but

That I claim, and desire to protect by Letters Patent of the UnitedStates, is-

1. In a telephone-switchboard, line-terminals, plugs for the terminals,movable contacts having portions adjacent each of said plugs and adaptedto be connected with any one of said plugs, and means for preventing allbut a single plug from engaging one of said contacts not in use.

2. In a telephone-switchboard, line-terminals, plugs for the terminals,movable plates having portions adjacent each of said plugs and adaptedto be connected with any one of said plugs, and means for preventing allbut a single plug from engaging one of said contacts not in use.

3. In a telephone-switchboard, line-terminals, plugs for the terminalspermanently carried by the board, and arranged in polygonal figures, andlongitudinally-movable contacts having portions adjacent each of saidplugs and adapted to be connected with any one of said plugs.

4. In a telephone-switchboard, line-terminals, plugs for said terminalspermanently carried by the board and arranged in polygonal iigures, andslidable contact-plates having portions adjacent each of said plugs andadapted to be connected With any one of said plugs.

5. In a telephone-switchboard, line-terminals, plugs for said terminalspermanently carried by the board and arranged in polygonal figures, andslidable contact-plates, having openings therein adjacent each of saidplugs and through Which' the latter are adapted to pass to connect anyone of said plugs With any one of said plates.

6. In a telephone-switchboard, line-terminals, plugs for said terminalspermanently carried by the board and arranged in polygonal figures,slidable contact-plates having openings therein adjacent each of saidplugs and through which the latter are adapted to pass and means forconnecting said plugs with said plates.

7. In a telephone-switchboard, line-terminals, plugs for said terminals,slidable contacts having portions adjacent each oi' said plugs and meanscarried by said plugs for engaging a contact not in use and forconnecting the same to the terminals.

8. In a telephone-switchboard, line-terminals, plugs for said terminals,slidable contacts having portions adjacent each of said plugs, meanscarried by said plugs for engaging a Contact not in use and forconnecting the same to the terminals, and means for moving said contactsinto operative position.

9. In a telephone-switchboard, line-terminals, plugs for said terminals,slidable contacts having portions adjacent each of said plugs and pawlscarried by said plugs for engaging a contact not in use and forconnecting the same to the terminals.

l0. In a telephone-switchboard, terminal plugs, movable contact-plateshaving portions adjacent each of said plugs and pawls carried by saidplugs adapted to pass through openings in said plates for engaging acontact not in use and for connecting the same to the terminals.

11. In a telephone-switchboard, line-terminals, a plug for eachterminal, a series of conductive plates, a part of each plate beingadjacent each terminal, automatic devices for each plug for engaging anyone of said plates, means for operating said plates to connect saidterminals electrically With other points.

12. In a telephone-switchboard, line-terminals therein, a plug for eachterminal, a series of slidable conductive plates a part of each platebeing adjacent each terminal, pawls carried by each plug for engagingany one of said plates, electromagnetic means for oper- IOO IIO

IZO

ating' said plates, said electromagnetic means being' controlled by saidpawls to connect said terminals electrically with other points.

13. 1n a teleplione-switchboard` plug-socl ets for each line-terl'ninal,a plug for each socket, pawls carried by each plug', a series ot'slidable conductive plates adapted to be engaged by any ot' said pawls,magnets controlled by said pawls ior drawing said plates into operativeposition so as to be permitted to engage the pawls or' but one plug at atime to connect said terminals electrically with other points.

14. ln a telephone-switchboard, plug-socl ets for each line-terminal, aplug Vtor each socket, pawls carried by each plug having parts thereofinsulated, a series o't slidable conductive plates adapted to be engagedby the uninsulated parts of any ol'l said pawls. magnets controlled bysaid pawls t'or d ra wing Said plates into operative position andelectromagnetic clearing-out devices also controlling said mag'nets.

15. 1n a telephone-switchboard, plug-sockets for each terminal, a plug'Alor each socket, a lixed conductor having parts adjacent cach of saidplugs, a battery connected with said conductor, a slidable contactcarried by each plug adapted to connect said conductor and theplug-socket, pawls carried by each plug, a series of slidable conductiveplates adapted to be engaged by any or' said pawls, magnets controlledby said pawls for drawing said plates into operative position, andelectromagnetic clearing-out devices also controlling said magnets.

16. In a telephone-switchboard, plug-sockets for eachv terminal, lixedcontacts adjacent said plug-sockets, a battery connected between saidcontacts, a plug for each socket, a tixed conductor having partsadjacent cach o't' said plugs, a battery connected with said conductor,slidablc contacts carried by each plug' adapted to connect saidconductor and said contact and also to connect the parts ot saidplug-sockets with said iixcd contacts lto energize the lines, pawlscarried by said plugs, a series of slidable conductive plates adapted tobe engaged by any of said pawls, magnets controlled by said pawls fordrawing said plates into operative position and electron'iagneticclearing-out devices also controlling said magnets.

17. ln a telephone-sw.itchboard, plug-sockets for each line-terminal, aplug for each socket, pawls carried by each plug, a series ot' slidableconductive plates adapted to be cn,- gaged by any of said pawls, magnetscontrolled by said pawls for drawing said plates into opcrativeposition, electromagnetic clearing-out devices also controlling saidmagnets, and projections carried by each slidable plate adapted torender said clearing-out devices inoperative when said plates are intheir inoperative or normal positions.

18. ln a telephone-switch board, plugs, pivoted pawls, carried bysaidplugs and a series o't' movable contacts with any one of which saidpawls are adapted to engage according to the position ot' said contacts.

19, ln a telephone-switchboard, plugs, two pivoted pawls projecting'from each plug, a series o'l movable contacts with any one otA which oneol said pawls is adapted to engage when in inoperative position and withwhich the other ol said pawls is adapted to engage when in oj'icrativeposition and means Jfor moving said contacts into operative position.

21).' ln a telephone-switchboard, plugs. two

.pivoted pawls, projecting from each plug, a

series oli' movable contacts, connections between said pawls iu eachplug t'or causing oneI pawl to engage any one ol said contacts when ininoperative position and for causing the other ot' said pawls to engagethe same coutact when in its operative position and means 'lfor movingsaid contacts into operative position.

21. lu a telephonc-switchboard, plugs, two

" pawls carried by each plug', said pawls being pivoted on the same axisand one ot' said pawls having a projection adapted to engage the otherto cause each to rotate with the other when moving in one directionlongitudinally of the plug, movable contacts adapted to be engaged bysaid pawls and means for moving' said contacts.

ln a telephone-switchboard, plugs, two pawls carried by each plug saidpawls being pivoted on the same axis and one of said pawls having' aprojection adapted to engage the other pawl to cause each to rotate withthe other when moving' in one direction longitudinally of the plug, aspring for holding one otl said pawls in position within the plug',movable contacts adapted to be engaged by said pawls, and means formoving said contacts.

,ln testimony whereof 1 have signed my name, in the presence of twowitnesses, this 6th day of August, 1903.

ISIDOR KITSEE.

lvitnesses:

Lnwis H. VAN DUsuN, Enw. W. VAILL, Jr.

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